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<head><meta charset="utf-8"><title>weekly meeting 2020-02-06 #54818 · t-compiler · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/index.html">t-compiler</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html">weekly meeting 2020-02-06 #54818</a></h3>

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<a name="187542626"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187542626" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187542626">(Feb 06 2020 at 12:16)</a>:</h4>
<p>Hi <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span> ; the triage meeting will be starting in 2 hours 44 minutes</p>



<a name="187542673"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187542673" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187542673">(Feb 06 2020 at 12:17)</a>:</h4>
<p>I will be doing <a href="#narrow/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-02-06.20.2354818/near/187542642" title="#narrow/stream/131828-t-compiler/topic/pre-meeting.20triage.202020-02-06.20.2354818/near/187542642">pre-triage in a parallel topic</a></p>



<a name="187542687"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187542687" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187542687">(Feb 06 2020 at 12:17)</a>:</h4>
<p>this week's WG checkins are with <span class="user-group-mention" data-user-group-id="1060">@WG-rls2.0</span> and <span class="user-group-mention" data-user-group-id="1123">@WG-self-profile</span></p>



<a name="187542767"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187542767" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187542767">(Feb 06 2020 at 12:18)</a>:</h4>
<p><span class="user-mention" data-user-id="133169">@matklad</span> , will you be around in about 3.5 hours to provide checkin for RLS 2.0?</p>



<a name="187542812"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187542812" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187542812">(Feb 06 2020 at 12:19)</a>:</h4>
<p><span class="user-mention" data-user-id="124287">@mw</span> or <span class="user-mention" data-user-id="125250">@Wesley Wiser</span> , will you be around in about 3.5 hours to provide checkin for WG-self-profile?</p>



<a name="187543737"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187543737" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187543737">(Feb 06 2020 at 12:34)</a>:</h4>
<p>I'll be building up today's specific agenda on <a href="https://hackmd.io/0zIctajhTEWcZF-J0dWNhg?both" target="_blank" title="https://hackmd.io/0zIctajhTEWcZF-J0dWNhg?both">this hackmd</a> as I do pre-triage</p>



<a name="187544066"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187544066" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187544066">(Feb 06 2020 at 12:39)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> I can give an update on WG-self-profile</p>



<a name="187544627"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187544627" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> matklad <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187544627">(Feb 06 2020 at 12:47)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> will be there!</p>



<a name="187554925"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187554925" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187554925">(Feb 06 2020 at 14:59)</a>:</h4>
<p>Write Hi <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span>! Add a <span aria-label="wave" class="emoji emoji-1f44b" role="img" title="wave">:wave:</span> emoji to show you're here :)</p>



<a name="187554958"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187554958" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187554958">(Feb 06 2020 at 14:59)</a>:</h4>
<p>we'll start with five minutes for ...</p>



<a name="187554989"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187554989" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187554989">(Feb 06 2020 at 15:00)</a>:</h4>
<h2>Announcements</h2>



<a name="187555037"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555037" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555037">(Feb 06 2020 at 15:00)</a>:</h4>
<ul>
<li>We have  design meeting this week, on <a href="https://github.com/rust-lang/compiler-team/issues/237" target="_blank" title="https://github.com/rust-lang/compiler-team/issues/237">parser-librarification</a></li>
</ul>



<a name="187555071"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555071" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555071">(Feb 06 2020 at 15:00)</a>:</h4>
<p>(meeting is, as usual, on Friday, starting same time as this meeting.)</p>



<a name="187555111"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555111" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555111">(Feb 06 2020 at 15:01)</a>:</h4>
<p>there's some great stuff to read up on ahead of time, if you follow the link above.</p>



<a name="187555204"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555204" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555204">(Feb 06 2020 at 15:02)</a>:</h4>
<p><span class="user-mention" data-user-id="116107">@davidtwco</span> are you around? Did you want to say anything about the status of your polymorphization work, or design questions there?</p>



<a name="187555239"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555239" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555239">(Feb 06 2020 at 15:02)</a>:</h4>
<ul>
<li>in case <span class="user-mention" data-user-id="116107">@davidtwco</span> is not available, I can at least point people to the ongoing conversation <a href="#narrow/stream/216091-t-compiler.2Fwg-polymorphization/topic/progress.20updates/near/187461928" title="#narrow/stream/216091-t-compiler.2Fwg-polymorphization/topic/progress.20updates/near/187461928">here</a></li>
</ul>



<a name="187555309"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555309" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555309">(Feb 06 2020 at 15:03)</a>:</h4>
<ul>
<li>in the same vein, <span class="user-mention" data-user-id="124287">@mw</span> has a major change proposal at <a href="https://github.com/rust-lang/compiler-team/issues/245" target="_blank" title="https://github.com/rust-lang/compiler-team/issues/245">compiler-team#245</a>: to make incr. comp. respect the -Ccodegen-units setting</li>
</ul>



<a name="187555430"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555430" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555430">(Feb 06 2020 at 15:04)</a>:</h4>
<p>(as major changes go, the proposed change is rather minor <code>:)</code> I mostly wanted to give the new process a test drive)</p>



<a name="187555475"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555475" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555475">(Feb 06 2020 at 15:05)</a>:</h4>
<p>Makes sense! (and so it makes sense for me to announce it here,as part of that test drive.)</p>



<a name="187555516"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555516" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555516">(Feb 06 2020 at 15:05)</a>:</h4>
<p>it does indeed</p>



<a name="187555605"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555605" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555605">(Feb 06 2020 at 15:06)</a>:</h4>
<p>one more announcement</p>



<a name="187555630"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555630" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555630">(Feb 06 2020 at 15:06)</a>:</h4>
<ul>
<li>Cargo report future-incompat <a href="https://github.com/rust-lang/rfcs/issues/2834" target="_blank" title="https://github.com/rust-lang/rfcs/issues/2834">rfc#2834</a> is I think on track to get an FCP merge request from the cargo team in the near future.</li>
</ul>



<a name="187555704"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555704" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555704">(Feb 06 2020 at 15:07)</a>:</h4>
<p>but it does interact with <code>rustc</code> too, so feel free to take a look there and give feedback.</p>



<a name="187555716"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555716" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555716">(Feb 06 2020 at 15:07)</a>:</h4>
<p>okay so having said all that, lets move on to the meeting agenda.</p>



<a name="187555777"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555777" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555777">(Feb 06 2020 at 15:08)</a>:</h4>
<p><a href="https://hackmd.io/0zIctajhTEWcZF-J0dWNhg?both" target="_blank" title="https://hackmd.io/0zIctajhTEWcZF-J0dWNhg?both">agenda items</a></p>



<a name="187555795"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555795" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555795">(Feb 06 2020 at 15:08)</a>:</h4>
<p>first, beta-nominations</p>



<a name="187555805"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555805" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555805">(Feb 06 2020 at 15:08)</a>:</h4>
<p>beta-nom 1/2: "Correct ICE caused by macros generating invalid spans." <a href="https://github.com/rust-lang/rust/issues/68611" target="_blank" title="https://github.com/rust-lang/rust/issues/68611">#68611</a></p>



<a name="187555962"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555962" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555962">(Feb 06 2020 at 15:10)</a>:</h4>
<p>I have to ask myself, should we be investing effort in fixing the fundamental brokenness with macros generating invalid spans? Hmm.</p>



<a name="187555986"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187555986" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187555986">(Feb 06 2020 at 15:10)</a>:</h4>
<p>seems harmless to backport, though an unconditional <code>warn</code> is suboptimal</p>



<a name="187556006"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556006" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556006">(Feb 06 2020 at 15:11)</a>:</h4>
<p>er, I guess it's a warn through log</p>



<a name="187556012"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556012" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556012">(Feb 06 2020 at 15:11)</a>:</h4>
<p>are you concerned that it e.g. won't respect cap-lints ?</p>



<a name="187556016"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556016" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556016">(Feb 06 2020 at 15:11)</a>:</h4>
<p>not sure what that does by default</p>



<a name="187556017"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556017" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556017">(Feb 06 2020 at 15:11)</a>:</h4>
<p>/me doesn't know</p>



<a name="187556022"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556022" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556022">(Feb 06 2020 at 15:11)</a>:</h4>
<p>well I mean it's obviously debug spew:</p>



<a name="187556023"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556023" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556023">(Feb 06 2020 at 15:11)</a>:</h4>
<blockquote>
<div class="codehilite"><pre><span></span>         warn!(&quot;Invalid span {:?}. Err={:?}&quot;, sp, e);
</pre></div>


</blockquote>



<a name="187556035"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556035" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556035">(Feb 06 2020 at 15:11)</a>:</h4>
<p>i.e., not suitable for an end user</p>



<a name="187556071"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556071" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556071">(Feb 06 2020 at 15:11)</a>:</h4>
<p>right. so the question, as you point out, is what <em>does</em> <code>log::warn!</code> do for a <code>rustc</code> end-user in the first place...</p>



<a name="187556132"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556132" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556132">(Feb 06 2020 at 15:12)</a>:</h4>
<p>maybe we hold off on backporting this until after we resolve that question?</p>



<a name="187556160"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556160" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556160">(Feb 06 2020 at 15:12)</a>:</h4>
<p>anyone want to take point on looking into that?</p>



<a name="187556182"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556182" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556182">(Feb 06 2020 at 15:12)</a>:</h4>
<p>(I would but I already self-assigned a bunch of bugs during pre-triage...)</p>



<a name="187556249"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556249" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556249">(Feb 06 2020 at 15:13)</a>:</h4>
<p>well anyway the point is that we will wait a week on this. (and likewise for the corresponding stable nom of the same PR)</p>



<a name="187556333"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556333" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556333">(Feb 06 2020 at 15:14)</a>:</h4>
<p>what is the timeline till next release?</p>



<a name="187556343"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556343" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556343">(Feb 06 2020 at 15:14)</a>:</h4>
<p>seems ok to wait a week, let's just leave a comment</p>



<a name="187556350"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556350" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556350">(Feb 06 2020 at 15:14)</a>:</h4>
<p>it's also true that there's no test (as <span class="user-mention" data-user-id="126931">@centril</span> pointed out on the PR)</p>



<a name="187556358"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556358" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556358">(Feb 06 2020 at 15:14)</a>:</h4>
<p>we had a release last week</p>



<a name="187556366"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556366" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556366">(Feb 06 2020 at 15:14)</a>:</h4>
<p>5 weeks?</p>



<a name="187556390"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556390" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556390">(Feb 06 2020 at 15:14)</a>:</h4>
<p>March 12th 2020</p>



<a name="187556404"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556404" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556404">(Feb 06 2020 at 15:15)</a>:</h4>
<blockquote>
<p>seems ok to wait a week, let's just leave a comment</p>
</blockquote>
<p>done</p>



<a name="187556456"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556456" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556456">(Feb 06 2020 at 15:15)</a>:</h4>
<p>(a regression test might also have allowed for more immediate answer to our running Q regarding <code>warn!</code>)</p>



<a name="187556470"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556470" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556470">(Feb 06 2020 at 15:16)</a>:</h4>
<p>beta-nom 2/2: "Do not ICE on multipart suggestions touching multiple files" <a href="https://github.com/rust-lang/rust/issues/68530" target="_blank" title="https://github.com/rust-lang/rust/issues/68530">#68530</a></p>



<a name="187556566"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556566" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556566">(Feb 06 2020 at 15:17)</a>:</h4>
<p>another case where there is no regression test</p>



<a name="187556593"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556593" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556593">(Feb 06 2020 at 15:17)</a>:</h4>
<p>yeah, I just left a comment about that</p>



<a name="187556622"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556622" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556622">(Feb 06 2020 at 15:17)</a>:</h4>
<p>it does seem "obviously correct" :)</p>



<a name="187556710"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556710" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556710">(Feb 06 2020 at 15:18)</a>:</h4>
<p>beta-approved then. We can do a regression test as a followup: <span class="user-mention" data-user-id="119031">@Esteban Küber</span> do you mind making a PR with a regression test (no need for backport of the test, i think)</p>



<a name="187556728"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556728" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556728">(Feb 06 2020 at 15:18)</a>:</h4>
<blockquote>
<p>it does seem "obviously correct" :)</p>
</blockquote>
<p>yes, I would be more interested in future refactorings maintaining that property</p>



<a name="187556753"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556753" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556753">(Feb 06 2020 at 15:19)</a>:</h4>
<p>I wonder if one could even lint for this</p>



<a name="187556756"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556756" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556756">(Feb 06 2020 at 15:19)</a>:</h4>
<p>I bet clippy aleady does</p>



<a name="187556770"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556770" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556770">(Feb 06 2020 at 15:19)</a>:</h4>
<p>"You're using unwrap in a method where <code>?</code> would work"</p>



<a name="187556910"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556910" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556910">(Feb 06 2020 at 15:20)</a>:</h4>
<p>hm, that seems like not always correct, so would need to be allow by default at least</p>



<a name="187556915"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556915" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556915">(Feb 06 2020 at 15:20)</a>:</h4>
<p>oKay that's all the beta-noms, and we're skipping the single stable-nom (its the same as the first beta-nom that we are waiting a week on.)</p>



<a name="187556928"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556928" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Esteban Küber <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556928">(Feb 06 2020 at 15:20)</a>:</h4>
<p>That can change the logic: sometimes bubbling up the error is incorrect and panicking is</p>



<a name="187556934"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187556934" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187556934">(Feb 06 2020 at 15:20)</a>:</h4>
<blockquote>
<p>hm, that seems like not always correct, so would need to be allow by default at least</p>
</blockquote>
<p>its definitely not always correct.</p>



<a name="187557011"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557011" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557011">(Feb 06 2020 at 15:21)</a>:</h4>
<p>anyway we need not go into the weeds there.</p>



<a name="187557091"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557091" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557091">(Feb 06 2020 at 15:22)</a>:</h4>
<p>there are three PRs marked S-waiting-on-team. I picked out one of them for us to discuss now:</p>



<a name="187557101"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557101" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557101">(Feb 06 2020 at 15:22)</a>:</h4>
<p>"Print nicer async/await trait errors for generators in any place in the error 'stack'"e <a href="https://github.com/rust-lang/rust/issues/67116" target="_blank" title="https://github.com/rust-lang/rust/issues/67116">#67116</a></p>



<a name="187557150"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557150" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557150">(Feb 06 2020 at 15:22)</a>:</h4>
<p><span class="user-mention" data-user-id="116009">@nikomatsakis</span> you want to drive discussion here, since you marked it thus?</p>



<a name="187557183"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557183" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557183">(Feb 06 2020 at 15:23)</a>:</h4>
<p>I'm guessing its waiting on us to decide about the "information overload" questions ?</p>



<a name="187557210"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557210" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557210">(Feb 06 2020 at 15:23)</a>:</h4>
<p>that's right</p>



<a name="187557216"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557216" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557216">(Feb 06 2020 at 15:23)</a>:</h4>
<p>I kind of forgot about this</p>



<a name="187557225"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557225" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557225">(Feb 06 2020 at 15:24)</a>:</h4>
<p>but basically we seem to be at an impasse</p>



<a name="187557268"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557268" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557268">(Feb 06 2020 at 15:24)</a>:</h4>
<p>and I'm looking to broaden the set of folks and get some idea how to resolve</p>



<a name="187557285"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557285" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557285">(Feb 06 2020 at 15:24)</a>:</h4>
<p>are there rustc flags to control the level of information output?</p>



<a name="187557297"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557297" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557297">(Feb 06 2020 at 15:24)</a>:</h4>
<p>Not that I know of</p>



<a name="187557304"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557304" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557304">(Feb 06 2020 at 15:24)</a>:</h4>
<p>I think it's debatable if we want to go that road</p>



<a name="187557321"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557321" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557321">(Feb 06 2020 at 15:24)</a>:</h4>
<p>We <em>have</em> talked in the past about a <code>--learn</code> flag, to give more useful output for beginners</p>



<a name="187557326"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557326" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557326">(Feb 06 2020 at 15:24)</a>:</h4>
<p>but this would be something rather different I suppose</p>



<a name="187557334"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557334" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557334">(Feb 06 2020 at 15:25)</a>:</h4>
<p>In any case, we don't have one.</p>



<a name="187557337"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557337" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557337">(Feb 06 2020 at 15:25)</a>:</h4>
<p>I do see that <span class="user-mention" data-user-id="116122">@simulacrum</span> suggested something similar on the comment thread</p>



<a name="187557355"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557355" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557355">(Feb 06 2020 at 15:25)</a>:</h4>
<p>I remember scala had a flag like this</p>



<a name="187557358"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557358" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557358">(Feb 06 2020 at 15:25)</a>:</h4>
<p>We do have -Zteach today</p>



<a name="187557364"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557364" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557364">(Feb 06 2020 at 15:25)</a>:</h4>
<p>I don't remember ever using it myself :)</p>



<a name="187557370"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557370" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557370">(Feb 06 2020 at 15:25)</a>:</h4>
<p>Yeah, but this isn't really about <em>teaching</em></p>



<a name="187557372"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557372" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557372">(Feb 06 2020 at 15:25)</a>:</h4>
<p>used... in some places</p>



<a name="187557387"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557387" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557387">(Feb 06 2020 at 15:25)</a>:</h4>
<p>This is an interesting point: "The issue with this is that enabling it will require a full rebuilds if the entire crate graph (and then another rebuild when you disable it again)."</p>



<a name="187557400"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557400" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557400">(Feb 06 2020 at 15:25)</a>:</h4>
<p>Seems like we could/should have a way to work around that.</p>



<a name="187557403"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557403" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557403">(Feb 06 2020 at 15:25)</a>:</h4>
<p>That's not actually true</p>



<a name="187557430"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557430" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557430">(Feb 06 2020 at 15:26)</a>:</h4>
<p><code>cargo rustc -- -Zteach</code>, for example</p>



<a name="187557461"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557461" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557461">(Feb 06 2020 at 15:26)</a>:</h4>
<p>would do the job</p>



<a name="187557463"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557463" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557463">(Feb 06 2020 at 15:26)</a>:</h4>
<p>(though notably that won't <em>always</em> work)</p>



<a name="187557469"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557469" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557469">(Feb 06 2020 at 15:26)</a>:</h4>
<p>but I Think we'd really want</p>



<a name="187557472"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557472" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557472">(Feb 06 2020 at 15:26)</a>:</h4>
<p>cargo build --teach</p>



<a name="187557486"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557486" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557486">(Feb 06 2020 at 15:26)</a>:</h4>
<blockquote>
<p><code>cargo rustc -- -Zteach</code>, for example</p>
</blockquote>
<p>as in, <code>cargo</code> does not treat <code>-Zteach</code> as something that should force a rebuild?</p>



<a name="187557501"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557501" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557501">(Feb 06 2020 at 15:26)</a>:</h4>
<p>regardless, I maintain that this is more of a "verbose" output thing</p>



<a name="187557511"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557511" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557511">(Feb 06 2020 at 15:26)</a>:</h4>
<p><code>cargo rustc</code> flags only affect the leaf compilation</p>



<a name="187557521"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557521" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557521">(Feb 06 2020 at 15:26)</a>:</h4>
<p>I don't think that <em>Teaching</em> and giving <em>all the info</em> are equivalent, in other words</p>



<a name="187557535"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557535" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557535">(Feb 06 2020 at 15:27)</a>:</h4>
<p>Right, I agree that <code>teach</code> is not the right thing here.</p>



<a name="187557540"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557540" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557540">(Feb 06 2020 at 15:27)</a>:</h4>
<p>In fact, maybe the opposite in some ways :)</p>



<a name="187557552"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557552" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557552">(Feb 06 2020 at 15:27)</a>:</h4>
<blockquote>
<p><code>cargo rustc</code> flags only affect the leaf compilation</p>
</blockquote>
<p>gotcha.</p>



<a name="187557562"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557562" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557562">(Feb 06 2020 at 15:27)</a>:</h4>
<p>(so <code>cargo rustc -p foo -- bar</code> will build all dependencies of <code>foo</code> <em>then</em> run <code>rustc</code> for <code>foo</code> with <code>bar</code> as extra flags)</p>



<a name="187557585"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557585" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557585">(Feb 06 2020 at 15:27)</a>:</h4>
<p>(maybe I (and Aaron1011?) was thinking of <del><code>RUSTC_FLAGS</code></del> <code>RUSTFLAGS</code> ?)</p>



<a name="187557595"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557595" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557595">(Feb 06 2020 at 15:28)</a>:</h4>
<p>Yes, I think so</p>



<a name="187557636"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557636" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557636">(Feb 06 2020 at 15:28)</a>:</h4>
<p>RUSTFLAGS, but yes</p>



<a name="187557642"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557642" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557642">(Feb 06 2020 at 15:28)</a>:</h4>
<p>Anyway, I guess I still believe that a more minimal output will be better, and that the danger of too much info is real, but as I wrote, i'm open to being told I am wrong. Maybe we should do some sort of poll on internals? twitter poll? I don't know</p>



<a name="187557646"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557646" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557646">(Feb 06 2020 at 15:28)</a>:</h4>
<p><code>RUSTFLAGS</code> affects the entire dependency graph yeah</p>



<a name="187557692"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557692" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557692">(Feb 06 2020 at 15:28)</a>:</h4>
<p>Okay well we've given the PR some visibility</p>



<a name="187557702"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557702" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557702">(Feb 06 2020 at 15:28)</a>:</h4>
<p>we don't need to make a decision right here</p>



<a name="187557708"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557708" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557708">(Feb 06 2020 at 15:28)</a>:</h4>
<p>I (still) think we should land it in nightly a <code>note:</code> asking for feedback if people are overwhelmed</p>



<a name="187557714"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557714" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557714">(Feb 06 2020 at 15:28)</a>:</h4>
<p>This is why I was suggesting that it'd be good to have some canonical writeup + example</p>



<a name="187557752"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557752" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557752">(Feb 06 2020 at 15:29)</a>:</h4>
<blockquote>
<p>I (still) think we should land it in nightly a <code>note:</code> asking for feedback if people are overwhelmed</p>
</blockquote>
<p>Interesting. We can discuss on thread. I feel like if they're overwhelmed, they'll skip past that too :)</p>



<a name="187557780"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557780" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557780">(Feb 06 2020 at 15:29)</a>:</h4>
<p>is there already a zulip topic for this PR for followup chat?</p>



<a name="187557796"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557796" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557796">(Feb 06 2020 at 15:29)</a>:</h4>
<p>Not that I'm aware of, discussion is on the PR</p>



<a name="187557862"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557862" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557862">(Feb 06 2020 at 15:30)</a>:</h4>
<p>okay. I guess we can keep discussion on PR if people like that, the comment thread there hasn't gotten out of control (yet)</p>



<a name="187557865"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557865" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557865">(Feb 06 2020 at 15:30)</a>:</h4>
<p>I'm going to try and open an internals topic I think</p>



<a name="187557874"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557874" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557874">(Feb 06 2020 at 15:30)</a>:</h4>
<p>I'd like feedback from users most of all</p>



<a name="187557942"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557942" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557942">(Feb 06 2020 at 15:31)</a>:</h4>
<p>okay, I assume <span class="user-mention" data-user-id="116009">@nikomatsakis</span> will post link to internals thread on the PR <a href="https://github.com/rust-lang/rust/issues/67116" target="_blank" title="https://github.com/rust-lang/rust/issues/67116">#67116</a>'s comment thread</p>



<a name="187557952"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557952" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557952">(Feb 06 2020 at 15:31)</a>:</h4>
<p>so lets move on</p>



<a name="187557967"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557967" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557967">(Feb 06 2020 at 15:31)</a>:</h4>
<p>I picked out five nominated issues for us to look at</p>



<a name="187557995"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187557995" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187557995">(Feb 06 2020 at 15:31)</a>:</h4>
<p>nominated: "TEXTREL in i686 since 1.41.0" <a href="https://github.com/rust-lang/rust/issues/68794" target="_blank" title="https://github.com/rust-lang/rust/issues/68794">#68794</a></p>



<a name="187558024"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558024" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558024">(Feb 06 2020 at 15:31)</a>:</h4>
<p>a change to compiler-builtins has broken android-x86</p>



<a name="187558095"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558095" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558095">(Feb 06 2020 at 15:32)</a>:</h4>
<p>I self-assigned this but I suspect there may be someone at this meeting better suited to investivgate</p>



<a name="187558114"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558114" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558114">(Feb 06 2020 at 15:32)</a>:</h4>
<p>specifically it's <a href="https://github.com/rust-lang/rust/commit/76a252ea9e7be93a61ffdf33b3533e24a9cf459d" target="_blank" title="https://github.com/rust-lang/rust/commit/76a252ea9e7be93a61ffdf33b3533e24a9cf459d">https://github.com/rust-lang/rust/commit/76a252ea9e7be93a61ffdf33b3533e24a9cf459d</a></p>



<a name="187558116"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558116" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558116">(Feb 06 2020 at 15:32)</a>:</h4>
<p>and also: Do we not test Android-x86 in our CI?</p>



<a name="187558177"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558177" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558177">(Feb 06 2020 at 15:33)</a>:</h4>
<p>we test arm-linux-androideabi</p>



<a name="187558181"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558181" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558181">(Feb 06 2020 at 15:33)</a>:</h4>
<p>gotcha</p>



<a name="187558184"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558184" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558184">(Feb 06 2020 at 15:33)</a>:</h4>
<p>no idea whether that's x86, to be honest</p>



<a name="187558206"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558206" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558206">(Feb 06 2020 at 15:33)</a>:</h4>
<p>the fact that it says "arm" makes me assume it is not x86</p>



<a name="187558261"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558261" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558261">(Feb 06 2020 at 15:34)</a>:</h4>
<p>sounds correct:)</p>



<a name="187558281"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558281" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558281">(Feb 06 2020 at 15:34)</a>:</h4>
<p>we do build rust for some other androids</p>



<a name="187558291"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558291" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558291">(Feb 06 2020 at 15:34)</a>:</h4>
<p>but I'm the one who didn't know that SystemV meant "everyone but windows" so what do I know</p>



<a name="187558304"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558304" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558304">(Feb 06 2020 at 15:34)</a>:</h4>
<p>I'm not yet clear if the problem is that you <em>cannot</em> build rust, or if it's some internal linting</p>



<a name="187558321"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558321" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558321">(Feb 06 2020 at 15:34)</a>:</h4>
<p>e.g. for whatever reason they don't want textrel</p>



<a name="187558344"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558344" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558344">(Feb 06 2020 at 15:35)</a>:</h4>
<p>anyway, is there anyone present with experience building for android-i686?</p>



<a name="187558353"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558353" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558353">(Feb 06 2020 at 15:35)</a>:</h4>
<p>(or "x86", whatever)</p>



<a name="187558364"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558364" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558364">(Feb 06 2020 at 15:35)</a>:</h4>
<p>Breaking android definitely seems bad, though I don't know how common i686 is -- the problem is <em>specific</em> to i686?</p>



<a name="187558414"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558414" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558414">(Feb 06 2020 at 15:35)</a>:</h4>
<p>I guess it'd be good to know which of those compiler-builtin PRs broke this, eh?</p>



<a name="187558490"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558490" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558490">(Feb 06 2020 at 15:36)</a>:</h4>
<p>the hypothesis is that it was <a href="https://github.com/rust-lang/compiler-builtins/pull/328" target="_blank" title="https://github.com/rust-lang/compiler-builtins/pull/328">https://github.com/rust-lang/compiler-builtins/pull/328</a></p>



<a name="187558500"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558500" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558500">(Feb 06 2020 at 15:36)</a>:</h4>
<p><del>and I think that was confirmed....?</del></p>



<a name="187558511"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558511" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558511">(Feb 06 2020 at 15:36)</a>:</h4>
<p>(Can I note one thing: it'd be nice if we had a github alias for "folks who work on / maintain compiler-builtlins")</p>



<a name="187558520"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558520" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558520">(Feb 06 2020 at 15:36)</a>:</h4>
<p>I honestly have no idea who that is :)</p>



<a name="187558546"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558546" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558546">(Feb 06 2020 at 15:37)</a>:</h4>
<blockquote>
<p>and I think that was confirmed....?</p>
</blockquote>
<p>oh, no, just the rollup commit bumping compiler-builtins was confirmed</p>



<a name="187558574"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558574" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558574">(Feb 06 2020 at 15:37)</a>:</h4>
<p>I think <span class="user-mention" data-user-id="132920">@gnzlbg</span> and <span class="user-mention" data-user-id="116015">@Alex Crichton</span> are probably good "point people" but not sure</p>



<a name="187558650"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558650" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558650">(Feb 06 2020 at 15:38)</a>:</h4>
<p>okay. Maybe I will try to ping them later, since no one else is jumping up and down saying that they are the local Android-x86 enthusiast</p>



<a name="187558667"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558667" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558667">(Feb 06 2020 at 15:38)</a>:</h4>
<p>lets move on</p>



<a name="187558692"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558692" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558692">(Feb 06 2020 at 15:38)</a>:</h4>
<p>nominated: "Unable to compile syntex_syntax using Rust 1.41" <a href="https://github.com/rust-lang/rust/issues/68729" target="_blank" title="https://github.com/rust-lang/rust/issues/68729">#68729</a></p>



<a name="187558730"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558730" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558730">(Feb 06 2020 at 15:39)</a>:</h4>
<p>I nominated this because I wanted to draw attention to the issue</p>



<a name="187558763"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558763" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558763">(Feb 06 2020 at 15:39)</a>:</h4>
<p>namely, we knew that this breakage was coming from a crater run</p>



<a name="187558791"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558791" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558791">(Feb 06 2020 at 15:39)</a>:</h4>
<p>looks like a WONTFIX to me</p>



<a name="187558843"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558843" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558843">(Feb 06 2020 at 15:40)</a>:</h4>
<p>(it was noted back in <a href="https://github.com/rust-lang/rust/pull/65785#issuecomment-546499161" target="_blank" title="https://github.com/rust-lang/rust/pull/65785#issuecomment-546499161">october</a>)</p>



<a name="187558863"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558863" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558863">(Feb 06 2020 at 15:40)</a>:</h4>
<p>I personally suspect that we should just treat this as fuel to motivate moving on cargo-report-future-incompat</p>



<a name="187558865"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558865" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558865">(Feb 06 2020 at 15:40)</a>:</h4>
<p>I also recall seeing this in the beta crater run but think I skipped filing an issue due to finding the PR</p>



<a name="187558868"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558868" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558868">(Feb 06 2020 at 15:40)</a>:</h4>
<p>but I wanted to at least point it out.</p>



<a name="187558895"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558895" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558895">(Feb 06 2020 at 15:41)</a>:</h4>
<p>the bug filer said "However, this kind of known breaking changes should be declared in blog posts of rustlang update."</p>



<a name="187558915"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558915" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558915">(Feb 06 2020 at 15:41)</a>:</h4>
<p>I was just going to mention that</p>



<a name="187558934"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187558934" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187558934">(Feb 06 2020 at 15:41)</a>:</h4>
<p>I think that is indeed reasonable, and I also liked your idea of keeping some kind of track, though I don't know how to do that in a reasonable way</p>



<a name="187559007"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559007" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559007">(Feb 06 2020 at 15:42)</a>:</h4>
<p>I can imagine there is tension between not wanting to draw unnecessary attention to breakage (i.e. inviting people to say "they're breaking their stability promise" when the reality is that the breakage truly does not matter)</p>



<a name="187559024"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559024" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559024">(Feb 06 2020 at 15:42)</a>:</h4>
<p>I think we've generally tried to stick it in compat notes</p>



<a name="187559036"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559036" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559036">(Feb 06 2020 at 15:42)</a>:</h4>
<p>where?</p>



<a name="187559046"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559046" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559046">(Feb 06 2020 at 15:42)</a>:</h4>
<p>(RELEASES.md)</p>



<a name="187559056"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559056" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559056">(Feb 06 2020 at 15:43)</a>:</h4>
<p>but it's hard</p>



<a name="187559064"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559064" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559064">(Feb 06 2020 at 15:43)</a>:</h4>
<p>e.g. inference breakage is expansive</p>



<a name="187559065"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559065" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559065">(Feb 06 2020 at 15:43)</a>:</h4>
<p>I agree, I think the idea is to tag the PR as "relnotes" or something?</p>



<a name="187559087"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559087" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559087">(Feb 06 2020 at 15:43)</a>:</h4>
<p>if the PR is tagged as relnotes, it has a much higher chance of not getting forgotten :)</p>



<a name="187559088"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559088" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559088">(Feb 06 2020 at 15:43)</a>:</h4>
<p>/me looks to see if RELEASES.md is linked from the blog post</p>



<a name="187559089"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559089" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559089">(Feb 06 2020 at 15:43)</a>:</h4>
<p>what is hard, naming all the crates?</p>



<a name="187559108"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559108" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559108">(Feb 06 2020 at 15:43)</a>:</h4>
<p>I guess we can lean towards being less constrained</p>



<a name="187559129"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559129" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559129">(Feb 06 2020 at 15:43)</a>:</h4>
<p>no, figuring out "Should we list this?"</p>



<a name="187559188"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559188" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559188">(Feb 06 2020 at 15:44)</a>:</h4>
<p>what makes it hard?</p>



<a name="187559207"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559207" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559207">(Feb 06 2020 at 15:44)</a>:</h4>
<p>(maybe we should discuss offline; just trying to understand the details)</p>



<a name="187559209"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559209" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559209">(Feb 06 2020 at 15:44)</a>:</h4>
<p>I guess -- tradeoff that <span class="user-mention" data-user-id="116083">@pnkfelix</span> mentioned</p>



<a name="187559213"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559213" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559213">(Feb 06 2020 at 15:44)</a>:</h4>
<blockquote>
<p>I can imagine there is tension between not wanting to draw unnecessary attention to breakage (i.e. inviting people to say "they're breaking their stability promise" when the reality is that the breakage truly does not matter)</p>
</blockquote>



<a name="187559214"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559214" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559214">(Feb 06 2020 at 15:44)</a>:</h4>
<p>OK.</p>



<a name="187559223"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559223" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559223">(Feb 06 2020 at 15:44)</a>:</h4>
<p>well if an error message is associated with a new breaking-change, is there harm is just listing that error message? And saying "you might want to try updating" ...)</p>



<a name="187559237"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559237" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559237">(Feb 06 2020 at 15:44)</a>:</h4>
<p>I feel like we're overdue for a revisiting of what our stability guarantees can/should be</p>



<a name="187559240"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559240" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559240">(Feb 06 2020 at 15:44)</a>:</h4>
<p>(Separately)</p>



<a name="187559244"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559244" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559244">(Feb 06 2020 at 15:44)</a>:</h4>
<p>Anyway, I have again achieved <em>my</em> goal of drawing attention to the issue</p>



<a name="187559252"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559252" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559252">(Feb 06 2020 at 15:45)</a>:</h4>
<p>But I guess I lean towards complete and honest reporting</p>



<a name="187559268"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559268" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559268">(Feb 06 2020 at 15:45)</a>:</h4>
<p>Not necessarily with an exhaustive list of affected crates (just because that's tedious and misleading, since we can't really know it)</p>



<a name="187559273"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559273" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559273">(Feb 06 2020 at 15:45)</a>:</h4>
<p>so I feel comfortable moving on. Maybe we will want a design meeting regarding stability guarantees going forward.</p>



<a name="187559290"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559290" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559290">(Feb 06 2020 at 15:45)</a>:</h4>
<p>I think we should be more eager to report yes</p>



<a name="187559293"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559293" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559293">(Feb 06 2020 at 15:45)</a>:</h4>
<p>Let's move on.</p>



<a name="187559306"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559306" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559306">(Feb 06 2020 at 15:46)</a>:</h4>
<p>nominated: "ICE field: higher-rank trait bound (HRTB) <code>for&lt;'a&gt; ...</code> hits OutputTypeParameterMismatch in librustc/traits/codegen" <a href="https://github.com/rust-lang/rust/issues/62529" target="_blank" title="https://github.com/rust-lang/rust/issues/62529">#62529</a></p>



<a name="187559353"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559353" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559353">(Feb 06 2020 at 15:46)</a>:</h4>
<p>I nominated this this morning</p>



<a name="187559381"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559381" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559381">(Feb 06 2020 at 15:46)</a>:</h4>
<p>because it collects a large set of bugs, and I added another to the set this morning</p>



<a name="187559406"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559406" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559406">(Feb 06 2020 at 15:46)</a>:</h4>
<p>so I wanted to ask: "even though these are all P-medium, they are piling up."</p>



<a name="187559436"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559436" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559436">(Feb 06 2020 at 15:46)</a>:</h4>
<p>Does this imply that we should prioritize lazy-norm for this year?</p>



<a name="187559480"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559480" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559480">(Feb 06 2020 at 15:47)</a>:</h4>
<p>I thnk we should for various reasons (and, indeed, sort of are?)</p>



<a name="187559487"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559487" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559487">(Feb 06 2020 at 15:47)</a>:</h4>
<p><span class="user-mention" data-user-id="116009">@nikomatsakis</span> and I have had conversations of this on and off</p>



<a name="187559490"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559490" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559490">(Feb 06 2020 at 15:47)</a>:</h4>
<p>Or at least we should prioritize resolving this problem</p>



<a name="187559506"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559506" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559506">(Feb 06 2020 at 15:47)</a>:</h4>
<p>One challenge is that I am still struggling to dedicate time to technical work</p>



<a name="187559510"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559510" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559510">(Feb 06 2020 at 15:47)</a>:</h4>
<p>Luckily others are routing around me</p>



<a name="187559514"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559514" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559514">(Feb 06 2020 at 15:47)</a>:</h4>
<p>right, I honestly couldn't remember if this fell into the same bucket we discussed.</p>



<a name="187559517"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559517" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559517">(Feb 06 2020 at 15:47)</a>:</h4>
<p>But I really want to be "in the fray" :)</p>



<a name="187559565"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559565" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559565">(Feb 06 2020 at 15:48)</a>:</h4>
<p>maybe this is just a topic for niko and I to discuss 1:1</p>



<a name="187559610"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559610" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559610">(Feb 06 2020 at 15:48)</a>:</h4>
<p>(and potentially pull in T-compiler members who are interested in assisting in the effort.)</p>



<a name="187559686"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559686" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559686">(Feb 06 2020 at 15:49)</a>:</h4>
<p>anyway okay I guess  I can't ask for more than that</p>



<a name="187559753"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559753" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559753">(Feb 06 2020 at 15:50)</a>:</h4>
<p>nominated: "[spurious] thread 'rustc' panicked at 'slice index starts at 24722962 but ends at 13279232', src/libcore/slice/mod.rs:2680:5" <a href="https://github.com/rust-lang/rust/issues/68132" target="_blank" title="https://github.com/rust-lang/rust/issues/68132">#68132</a></p>



<a name="187559765"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559765" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559765">(Feb 06 2020 at 15:50)</a>:</h4>
<p>this is a bug that I left nominated because I didn't know how to prioritize it</p>



<a name="187559784"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559784" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559784">(Feb 06 2020 at 15:50)</a>:</h4>
<p>its spurious, its perhaps non-actionable.</p>



<a name="187559791"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559791" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559791">(Feb 06 2020 at 15:50)</a>:</h4>
<p>I don't see any way to reproduce it</p>



<a name="187559870"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559870" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559870">(Feb 06 2020 at 15:51)</a>:</h4>
<p>as long as it doesn't show up with our regular backends, this is low priority, I'd say</p>



<a name="187559920"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559920" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559920">(Feb 06 2020 at 15:52)</a>:</h4>
<p>okay. I'll mark P-low with intent to close</p>



<a name="187559928"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559928" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559928">(Feb 06 2020 at 15:52)</a>:</h4>
<p>(close as non-actionable)</p>



<a name="187559960"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187559960" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187559960">(Feb 06 2020 at 15:52)</a>:</h4>
<p>do we know if adding <code>#[track_caller}</code> to the various slice methods would improve the panic feedback in cases like this? If so, is that worth doing, or is it too costly?</p>



<a name="187560044"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560044" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560044">(Feb 06 2020 at 15:53)</a>:</h4>
<p>final nomination: "Worsened debug build codegen in beta" <a href="https://github.com/rust-lang/rust/issues/68855" target="_blank" title="https://github.com/rust-lang/rust/issues/68855">#68855</a></p>



<a name="187560139"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560139" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560139">(Feb 06 2020 at 15:54)</a>:</h4>
<p>I just wanted to draw attention to this bug. I don't think there's anything specific to discuss yet, besides "someone noticed our codegen is worse in beta. It would be great if we could allocate resources to investigate that."</p>



<a name="187560162"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560162" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560162">(Feb 06 2020 at 15:55)</a>:</h4>
<p>there's a slightly higher priority thing</p>



<a name="187560181"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560181" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560181">(Feb 06 2020 at 15:55)</a>:</h4>
<p>Hmm</p>



<a name="187560183"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560183" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560183">(Feb 06 2020 at 15:55)</a>:</h4>
<p><span class="user-mention" data-user-id="125250">@Wesley Wiser</span> pointed out to me that there is a stable nomination that I overlooked</p>



<a name="187560197"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560197" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560197">(Feb 06 2020 at 15:55)</a>:</h4>
<p>because I had wrongly assumeed that the stable-noms were always a subset of beta-nom</p>



<a name="187560218"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560218" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560218">(Feb 06 2020 at 15:55)</a>:</h4>
<p>stable-nom: "Resolve long compile times when evaluating always valid constants" <a href="https://github.com/rust-lang/rust/issues/67667" target="_blank" title="https://github.com/rust-lang/rust/issues/67667">#67667</a></p>



<a name="187560319"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560319" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560319">(Feb 06 2020 at 15:56)</a>:</h4>
<p>possibly related to the other change :P</p>



<a name="187560327"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560327" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560327">(Feb 06 2020 at 15:57)</a>:</h4>
<p>this apparently is indeed resolving a stable-to-stable regression; the associated issue's labels are (supposedly) out of date.</p>



<a name="187560346"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560346" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560346">(Feb 06 2020 at 15:57)</a>:</h4>
<blockquote>
<p>possibly related to the other change :P</p>
</blockquote>
<p>beg pardon?</p>



<a name="187560370"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560370" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560370">(Feb 06 2020 at 15:57)</a>:</h4>
<p>I'm sure it's not</p>



<a name="187560373"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560373" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560373">(Feb 06 2020 at 15:57)</a>:</h4>
<p>I have not confirmed the out of date problem to be clear</p>



<a name="187560382"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560382" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560382">(Feb 06 2020 at 15:57)</a>:</h4>
<p>I was just noting that this touched constants</p>



<a name="187560464"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560464" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560464">(Feb 06 2020 at 15:58)</a>:</h4>
<p>Looks very safe to me, I think</p>



<a name="187560487"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560487" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560487">(Feb 06 2020 at 15:58)</a>:</h4>
<p>Anyway, yes, <span aria-label="back" class="emoji emoji-1f519" role="img" title="back">:back:</span> from me</p>



<a name="187560494"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560494" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560494">(Feb 06 2020 at 15:58)</a>:</h4>
<p>stable-accepted then</p>



<a name="187560523"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560523" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560523">(Feb 06 2020 at 15:58)</a>:</h4>
<p>okay</p>



<a name="187560527"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560527" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560527">(Feb 06 2020 at 15:58)</a>:</h4>
<p>WG checkins!</p>



<a name="187560538"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560538" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560538">(Feb 06 2020 at 15:59)</a>:</h4>
<p><span class="user-mention" data-user-id="133169">@matklad</span> for <span class="user-group-mention" data-user-group-id="1060">@WG-rls2.0</span> : ?</p>



<a name="187560545"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560545" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> matklad <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560545">(Feb 06 2020 at 15:59)</a>:</h4>
<p>Sure!</p>



<a name="187560589"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560589" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> matklad <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560589">(Feb 06 2020 at 15:59)</a>:</h4>
<p>Nothing too big happened recently, we are just steadily improving things that we have</p>



<a name="187560673"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560673" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> matklad <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560673">(Feb 06 2020 at 16:00)</a>:</h4>
<p>Like adapting the recent improvements in Chalk (which reduced crashes a lot) or moving <code>cargo check</code> handling into the server (which means errors in <em>any</em> editor, not just VS Code)</p>



<a name="187560681"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560681" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560681">(Feb 06 2020 at 16:00)</a>:</h4>
<p>I think the biggest "update" might be that</p>



<a name="187560690"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560690" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560690">(Feb 06 2020 at 16:00)</a>:</h4>
<p>okay. and of course we have that design meeting tomorrow.</p>



<a name="187560694"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560694" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560694">(Feb 06 2020 at 16:00)</a>:</h4>
<p><span class="user-mention" data-user-id="133169">@matklad</span> and I have been slowly iterating on an RFC</p>



<a name="187560710"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560710" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560710">(Feb 06 2020 at 16:00)</a>:</h4>
<p>to make the plan to merge RLS/rust-analyzer "official"</p>



<a name="187560721"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560721" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560721">(Feb 06 2020 at 16:01)</a>:</h4>
<p>which we probably need to just finish up already</p>



<a name="187560736"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560736" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> matklad <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560736">(Feb 06 2020 at 16:01)</a>:</h4>
<p>We also slowly working on <em>production readiness</em>: we now have binary releases, and are palning to publish extension to the  VS Code marketplace "soon".</p>



<a name="187560759"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560759" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560759">(Feb 06 2020 at 16:01)</a>:</h4>
<p>Wow wow sounds great.</p>



<a name="187560765"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560765" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560765">(Feb 06 2020 at 16:01)</a>:</h4>
<p>we were also discussing (just recently, when <span class="user-mention" data-user-id="116083">@pnkfelix</span> and I were in Berlin) how important it would be to use save-analysis at all</p>



<a name="187560794"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560794" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> matklad <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560794">(Feb 06 2020 at 16:02)</a>:</h4>
<p>That is, we work on making it more "just plug &amp; play" from both directions: in practice, and via official RFC plan</p>



<a name="187560827"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560827" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560827">(Feb 06 2020 at 16:02)</a>:</h4>
<p>i.e., if we just don't yet support find all usages, maybe we don't need it, which sidesteps some complexity and controversy, at the cost of a feature regerssion</p>



<a name="187560851"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560851" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560851">(Feb 06 2020 at 16:02)</a>:</h4>
<p>(something to be discussed separately, but which seems worth surfacing here)</p>



<a name="187560860"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560860" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560860">(Feb 06 2020 at 16:02)</a>:</h4>
<p>so yeah, everyone, if you're interested in that discussion</p>



<a name="187560867"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560867" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560867">(Feb 06 2020 at 16:02)</a>:</h4>
<p>go find them in the <a class="stream" data-stream-id="185405" href="/#narrow/stream/185405-t-compiler.2Fwg-rls-2.2E0">#t-compiler/wg-rls-2.0</a> stream</p>



<a name="187560870"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560870" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560870">(Feb 06 2020 at 16:02)</a>:</h4>
<p>next checkin</p>



<a name="187560884"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560884" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560884">(Feb 06 2020 at 16:02)</a>:</h4>
<p><span class="user-mention" data-user-id="124287">@mw</span> on WG-self-profile</p>



<a name="187560898"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560898" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560898">(Feb 06 2020 at 16:03)</a>:</h4>
<p>(if we haven't lost <span class="user-mention" data-user-id="124287">@mw</span>  due to going over time ... <span aria-label="sad" class="emoji emoji-2639" role="img" title="sad">:sad:</span> )</p>



<a name="187560902"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560902" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560902">(Feb 06 2020 at 16:03)</a>:</h4>
<p>yup, here goes:</p>



<a name="187560911"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560911" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560911">(Feb 06 2020 at 16:03)</a>:</h4>
<p>There's been quite a bit of progress!</p>



<a name="187560920"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560920" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560920">(Feb 06 2020 at 16:03)</a>:</h4>
<ul>
<li>
<p>We finished our <a href="https://github.com/rust-lang/rust/issues/58967" target="_blank" title="https://github.com/rust-lang/rust/issues/58967">"Minimum Viable Product"</a> <code>\o/</code><br>
  This basically means that self-profiling is enabled for all <a href="https://perf.rust-lang.org/" target="_blank" title="https://perf.rust-lang.org/">perf.rlo</a> runs and we automatically provide<br>
  detailed (comparison) views (<a href="https://perf.rust-lang.org/detailed-query.html?commit=3761dcd3467441f78939ccb3b341b03b6a7558d7&amp;base_commit=ac2f3fa41ac5ae8425b959f955bb7433b7c57aea&amp;benchmark=await-call-tree-debug&amp;run_name=clean" target="_blank" title="https://perf.rust-lang.org/detailed-query.html?commit=3761dcd3467441f78939ccb3b341b03b6a7558d7&amp;base_commit=ac2f3fa41ac5ae8425b959f955bb7433b7c57aea&amp;benchmark=await-call-tree-debug&amp;run_name=clean">example</a>) of where the compiler spends its time. </p>
<p>We should write a blog post about this some time soon.</p>
</li>
</ul>



<a name="187560927"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560927" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560927">(Feb 06 2020 at 16:03)</a>:</h4>
<ul>
<li>We implemented query-key recording, which means that recorded events can now be attributed to individual query invocations. Arguments for non-query events are soon to follow (e.g. LLVM module names)</li>
</ul>



<a name="187560937"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560937" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560937">(Feb 06 2020 at 16:03)</a>:</h4>
<ul>
<li>There's an open PR by <span class="user-mention" data-user-id="125799">@andjo403</span> that adds tracking of individual LLVM passes <span aria-label="100" class="emoji emoji-1f4af" role="img" title="100">:100:</span></li>
</ul>



<a name="187560953"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560953" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560953">(Feb 06 2020 at 16:03)</a>:</h4>
<ul>
<li>
<p><span class="user-mention" data-user-id="125250">@Wesley Wiser</span>'s <a href="https://github.com/rust-lang/measureme/tree/master/crox" target="_blank" title="https://github.com/rust-lang/measureme/tree/master/crox">crox</a> can now generate profiles for entire Cargo invocations via the <code>--dir</code> flag. This is incredibly useful and actually pretty easy to use. Being able to inspect the various rustc processes and their individual threads on a common timeline is quite eye opening. </p>
<p>I think <code>crox</code> deserves a blog post by itself.</p>
</li>
</ul>



<a name="187560967"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187560967" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187560967">(Feb 06 2020 at 16:03)</a>:</h4>
<p>Recently activity of the working group has slowed down a bit since both <span class="user-mention" data-user-id="125250">@Wesley Wiser</span> and I have been working on other things. We'll see where we'll go from here. Publishing blog posts about the awesome tooling already implemented seems like a good idea.</p>



<a name="187561032"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561032" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561032">(Feb 06 2020 at 16:04)</a>:</h4>
<p>It's in the early stages but I've started writing a post for Inside-Rust</p>



<a name="187561042"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561042" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561042">(Feb 06 2020 at 16:04)</a>:</h4>
<p>thank you for saying what crox is</p>



<a name="187561051"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561051" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561051">(Feb 06 2020 at 16:04)</a>:</h4>
<p>I had seen references to that but hadn 't gotten context</p>



<a name="187561124"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561124" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561124">(Feb 06 2020 at 16:05)</a>:</h4>
<p>ChRomium OXide =&gt; visualizing the self-profilng data with Chromium's profiler</p>



<a name="187561159"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561159" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561159">(Feb 06 2020 at 16:05)</a>:</h4>
<p>I'm happy to report that quite a few people gave feedback on how useful self-profiling was for them</p>



<a name="187561179"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561179" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561179">(Feb 06 2020 at 16:05)</a>:</h4>
<p>This is super awesome</p>



<a name="187561230"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561230" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561230">(Feb 06 2020 at 16:06)</a>:</h4>
<p>I am going to ask my usual question</p>



<a name="187561233"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561233" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561233">(Feb 06 2020 at 16:06)</a>:</h4>
<p>Is there docs I can point people at? :)</p>



<a name="187561244"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561244" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561244">(Feb 06 2020 at 16:06)</a>:</h4>
<p>(In particular, maybe in the unstable rustc guide?:)</p>



<a name="187561263"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561263" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561263">(Feb 06 2020 at 16:06)</a>:</h4>
<p>I think that's what the blog posts should be?</p>



<a name="187561265"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561265" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561265">(Feb 06 2020 at 16:06)</a>:</h4>
<p>But seriously this really <em>is</em> very cool, I love the integration into perf</p>



<a name="187561287"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561287" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561287">(Feb 06 2020 at 16:06)</a>:</h4>
<p>The rustc-guide will at least tell you where to go :) <a href="https://rust-lang.github.io/rustc-guide/profiling.html" target="_blank" title="https://rust-lang.github.io/rustc-guide/profiling.html">https://rust-lang.github.io/rustc-guide/profiling.html</a></p>



<a name="187561308"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561308" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561308">(Feb 06 2020 at 16:06)</a>:</h4>
<p>OK, I was thinking of the rustc book</p>



<a name="187561320"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561320" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561320">(Feb 06 2020 at 16:07)</a>:</h4>
<p>like, the user's guide</p>



<a name="187561325"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561325" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561325">(Feb 06 2020 at 16:07)</a>:</h4>
<p>but having the info in rustc-guide is a good start</p>



<a name="187561334"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561334" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561334">(Feb 06 2020 at 16:07)</a>:</h4>
<p>maybe I'll open a PR copying the links...</p>



<a name="187561347"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561347" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561347">(Feb 06 2020 at 16:07)</a>:</h4>
<p>Can always file an issue in .... some repo ...</p>



<a name="187561355"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561355" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561355">(Feb 06 2020 at 16:07)</a>:</h4>
<p>with that TODO item</p>



<a name="187561361"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561361" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> davidtwco <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561361">(Feb 06 2020 at 16:07)</a>:</h4>
<blockquote>
<p><span class="user-mention silent" data-user-id="116107">davidtwco</span> are you around? Did you want to say anything about the status of your polymorphization work, or design questions there?</p>
</blockquote>
<p>(sorry, missed the start of the meeting, the ongoing conversation you linked to summarizes the main decisions that I was unsure about)</p>



<a name="187561364"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561364" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561364">(Feb 06 2020 at 16:07)</a>:</h4>
<p>okay this is great stuff</p>



<a name="187561371"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561371" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561371">(Feb 06 2020 at 16:07)</a>:</h4>
<p>(side note, we don't describe unstable things in the "rustc book" anyway, though I'm unconvinced that's a good policy, so really it'd be the unstable guide)</p>



<a name="187561397"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561397" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561397">(Feb 06 2020 at 16:07)</a>:</h4>
<blockquote>
<p>I'm happy to report that quite a few people gave feedback on how useful self-profiling was for them</p>
</blockquote>
<p>mostly I want to keep directing people to this, I think there's a ton of value here</p>



<a name="187561465"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561465" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561465">(Feb 06 2020 at 16:08)</a>:</h4>
<p>I'm going to tie the meeting itself off now (but people are free to keep discussing obviously).</p>



<a name="187561473"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561473" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561473">(Feb 06 2020 at 16:08)</a>:</h4>
<p>If you cc me on the issue, I'll make sure we include something there. I didn't know the unstable rustc book was a thing</p>



<a name="187561480"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561480" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561480">(Feb 06 2020 at 16:08)</a>:</h4>
<p>Thanks to everyone in <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span> for attending!</p>



<a name="187561592"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561592" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561592">(Feb 06 2020 at 16:09)</a>:</h4>
<blockquote>
<p>If you cc me on the issue, I'll make sure we include something there. I didn't know the unstable rustc book was a thing</p>
</blockquote>
<p>it's <a href="https://doc.rust-lang.org/unstable-book/" target="_blank" title="https://doc.rust-lang.org/unstable-book/">published here</a>, and the <a href="https://github.com/rust-lang/rust/tree/master/src/doc/unstable-book" target="_blank" title="https://github.com/rust-lang/rust/tree/master/src/doc/unstable-book">sources are here</a> -- but I don't know how many people even look at it. Mostly I think that having a guide that explains how to use some of rustc's more esoteric features seems good though</p>



<a name="187561765"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561765" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561765">(Feb 06 2020 at 16:11)</a>:</h4>
<p>personally I think we should document unstable flags in a special section of <a href="https://doc.rust-lang.org/rustc/index.html" target="_blank" title="https://doc.rust-lang.org/rustc/index.html">the rustc book</a></p>



<a name="187561772"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561772" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561772">(Feb 06 2020 at 16:11)</a>:</h4>
<p>especially "semi-stable" ones like this</p>



<a name="187561791"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561791" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561791">(Feb 06 2020 at 16:11)</a>:</h4>
<p>but in any case I think <span class="user-mention" data-user-id="124287">@mw</span> is right that a blog post is a better starting point and will get more attention :P</p>



<a name="187561810"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561810" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561810">(Feb 06 2020 at 16:11)</a>:</h4>
<p>I'd just like to have something in there that's like "you can profile your code! check out the README here to learn more"</p>



<a name="187561992"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187561992" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187561992">(Feb 06 2020 at 16:13)</a>:</h4>
<p>For the blog, my goal is to show step-by-step how to use all of the tools in <code>measureme</code> to diagnose/inspect where rustc is spending it's compile time. It should be easy to convert that into a tutorial in the crate docs later.</p>



<a name="187562605"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187562605" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187562605">(Feb 06 2020 at 16:19)</a>:</h4>
<p>Yes, beautiful</p>



<a name="187563954"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-02-06%20%2354818/near/187563954" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-02-06.20.2354818.html#187563954">(Feb 06 2020 at 16:32)</a>:</h4>
<blockquote>
<p>Anyway, I guess I still believe that a more minimal output will be better, and that the danger of too much info is real, but as I wrote, i'm open to being told I am wrong. Maybe we should do some sort of poll on internals? twitter poll? I don't know</p>
</blockquote>
<p><a href="https://internals.rust-lang.org/t/poll-how-much-context-to-give-for-async-error-messages/11753" target="_blank" title="https://internals.rust-lang.org/t/poll-how-much-context-to-give-for-async-error-messages/11753">I created an internals thread</a> that includes a poll about the async-await error message. cc <span class="user-mention" data-user-id="116122">@simulacrum</span> <span class="user-mention" data-user-id="119031">@Esteban Küber</span> <span class="user-mention" data-user-id="125294">@Aaron Hill</span> and maybe <span class="user-group-mention" data-user-group-id="1187">@WG-diagnostics</span> too? :)</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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